| error[E0594]: cannot assign to `x`, as it is not declared as mutable | |
| --> $DIR/coroutine-upvar-mutability.rs:10:9 | |
| | | |
| LL | x = 1; | |
| | ^^^^^ cannot assign | |
| | | |
| help: consider changing this to be mutable | |
| | | |
| LL | let mut x = 0; | |
| | +++ | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0594`. |